阿尔泰山喀纳斯河谷第四纪冰川研究进展与问题  

Review and problems of quaternary glacier research in the Kanas River valley,Altai Mountains, China

作　　者：刘亮[1] 许姗 柴乐[1] 张威[1] LIU Liang(School of Urban and Environment,Liaoning Normal University,Liaoning Dalian 116029,China)

机构地区：[1]辽宁师范大学城市与环境学院,辽宁大连116029

出　　处：《国土与自然资源研究》2018年第5期48-51,共4页Territory & Natural Resources Study

基　　金：国家自然科学基金项目(41501068;41671005;41271093)

摘　　要：喀纳斯河谷位于中国境内的阿尔泰山南坡中段,研究区陈列了多期次第四纪冰川遗迹,是研究区域地貌过程演化和古气候变化的重要载体。经过近40年的研究,取得了阶段性成果:第一,摸清冰川地貌特征,运用地貌地层学原理进行冰期序列的配套;第二,年代学进展喜人,利用14C、OSL、ESR、CR N等绝对定年技术获得了一批年代学数据,并据此划分了详细的冰进阶段,分别对应MIS 6、MIS 5、MIS 4、MIS 3、MIS 2(LGM)以及新冰期和小冰期。取得成果的同时,也暴露出新的问题,如:各阶段冰进范围划定存在争议;利用各种测年手段确定湖口冰碛丘陵的形成年代存在差异;LGM以来的年代学研究薄弱。这些问题需要在下一步工作中进行更深入的研究与探讨。Kanas River valley is located in the middle part of the southern slopes of Altai Mountains,China.The study area displays several quaternary glacial traces,which is an important carrier for the study of regional geomorphological process evolution and paleoclimatic change.After nearly 40 years of research,several achievements have been made:First,the features of glacier landform have been clarified,and the glacial sequence has been matched with the geomorphological stratigraphy.Secondly,the progress of chronology is gratifying,using the absolute dating techniques such as 14C,optically stimulated luminescence(OSL),electron spin resonance(ESR),cosmogenic radionuclide(CRN)to divide glaciations:marine isotope stage(MIS)6,5,4,3,2,as well as the Neoglaciation and Little Ice Age.While achieving results,new problems have been exposed,such as:the glacial range in different stages is in dispute;results of various dating methods are different;chronology since last glacial maximum(LGM)is weak.These issues need further research and discussion in the next step.

关 键 词：阿尔泰山 喀纳斯 冰川地貌 年代学 进展 

分 类 号：P534.63[天文地球—第四纪地质学]